baber/WOPTO huggingface dataset:
Patent CA-2012227-C (CA)
Title: Production of terephthalate esters by degradative transesterification of scrap or virgin terephthalate polyesters
Inventor: DUPONT LOUIS
IPC: C07C67/48
Filed: 1990-03-15
Granted: 2001-08-14
Abstract: A process for the production of terephthalate diesters having the following formula (I).   (see formula I) Substituents R and R' are 'the same or different and represent a straight chain, branched or cyclic aliphatic group, an aromatic group, an alkaryl group or an aralkyl group, each group having from 6 to 20 carbon atoms. The process involves reacting a terephthalate polyester with a high molecular weight alcohol or a mixture of high molecular weight alcohols each having from 6 to 20 carbon atoms, in the presence of a catalyst and recovering the desired compound according to formula (I).      This process is particularly useful for recycling scrap terephthalate polyester products such as those produced from polyethylene terephthalate (PET), crystallized polyethylene terephthalate (CPET), glycol-modified polyethylene terephthalate copolyester (PETG), polybutylene terephthalate (PBT), polycyclohexanedimethylene terephthalate  (PCT), as well as the acid- and glycol-modified copolyesters of PCT, respectively PCTA and PCTG.
Patent CA-2013081-C (CA)
Title: High strength, high fracture toughness structural alloy
Inventor: HEMPHILL RAYMOND M
IPC: C22C38/52
Filed: 1990-03-26
Granted: 1997-01-07
Abstract: A high strength, high fracture toughness structural steel alloy consisting essentially of, in weight percent, about C         0.2-0.33 Cr        2-4 Ni        10.5-15 Mo        0.75-1.75 Co        8-17 Fe  Balance and an article made therefrom are disclosed.  The alloy is an age-hardenable martensitic steel alloy which provides a unique combination of tensile strength and fracture toughness.  The alloy provides excellent mechanical properties when hardened by vacuum heat treatment with inert gas cooling and has a low ductile-to-brittle transition temperature.
Patent CA-2016892-C (CA)
Title: Ampulle
Inventor: HANSEN BERND
IPC: A61J1/05
Filed: 1990-05-16
Granted: 1997-11-18
Abstract: An ampule for a liquid, removed from the ampule by a hypodermic syringe, has a neck.  A conical member on one end of the hypodermic syringe is introduced into the neck of the ampule.  The inside wall of the neck of the ampule is of a configuration which allows for the passage of air, but does not allow the passage of liquid in the area intended for the installation   of   the   conical   member.    The   shaped configuration between the socket member wall and the inside wall of the neck of the ampule is in the form of a circular closed line.
Patent CA-2023432-C (CA)
Title: Water-in-oil type emulsion explosive
Inventor: TANABE YOSHIO
IPC: C06B47/14
Filed: 1990-08-16
Granted: 2000-02-01
Abstract: This invention relates to a water-in-oil type emulsion explosive comprising an aqueous oxidizer solution, an oily material, an emulsifier and hollow microspheres, in which the whole or a part of the oily material is replaced with a polymer which is oil-soluble and has a ladder structure in the molecule. Preferably, the polymer is one obtained by polymerizing cyclopentadiene, dicyclopentadiene or methylcyclopentadiene.
Patent CA-2023559-C (CA)
Title: Process for the preparation of a polyolefin
Inventor: DOLLE VOLKER
IPC: C08F10/00
Filed: 1990-08-17
Granted: 2001-10-30
Abstract: Process for the preparation of a polyolefin Olefins of the formula R11-CH=CH-R12 (R11, R12 = H or C1-C14-alkyl) are polymerized in the presence of a catalyst consisting of at least one metallocene of the formula I      (M = zirconium or hafnium) and an aluminoxane. Polymers having a high molecular weight are obtained in a high yield.
Patent CA-2030102-C (CA)
Title: Method and apparatus for removing solid particulates from a fluid stream
Inventor: SMOLENSKY LEO A
IPC: B04C9/00
Filed: 1990-11-15
Granted: 2000-06-20
Abstract: Solid particulates are removed from a solid particulate-laden fluid stream by passing the solid particulate laden fluid stream into a potential flow centrifugal separator which splits the potential solid particulate-laden fluid stream into a clean fluid stream and a concentrated solid particulate-laden fluid stream, passing the concentrated solid particulate-laden fluid stream into a solids collector which extracts solid particulates from the concentrated solid particulate-laden fluid stream leaving a fluid stream having a reduced solid particulate content, and conducting the fluid stream having a reduced solid particulate content back into the potential flow centrifugal separator for further processing.
Patent CA-2035222-C (CA)
Title: Spikeless motor starting circuit
Inventor: CHMIEL STEVEN F
IPC: H02P1/44
Filed: 1991-01-29
Granted: 2000-05-02
Abstract: A capacitor-start capacitor-run single phase AC induction motor control starting circuit is provided which minimizes first cycle current spiking magnitude, and also minimizes cycle to cycle current spiking magnitude, without a choke or inductor in the loop containing the run capacitor, start capacitor and start switch. The first cycle current spiking problem is solved by controlling when the start switch may be turned on at initiation of the starting mode in relation to the AC cycle, to permit turn-on of the start switch only within a known or predictable range of voltage differential between the run and start capacitors. The cycle to cycle current spiking problem is solved by proper phasing of gate current, and supplying gate current to the start switch in phase with the voltage across the run capacitor and out of phase with the current through the series connected start switch and start capacitor.
Patent CA-2036420-C (CA)
Title: Nonionic surfactant as a pigment dispersant and film build additive
Inventor: DEBROY TAPAN K
IPC: C09D7/12
Filed: 1991-02-15
Granted: 2001-05-08
Abstract: Disclosed herein are electrodepositable cationic baths containing nonionic pigment dispersants. These nonionic pigment dispersants are ethoxylated styrenated phenols which allow for increased production capacity and lower VOC. The ethoxylated styrenated phenols are also used as an additive which can increase film build and improve film smoothness.
Patent CA-2042785-C (CA)
Title: Mobile data telephone
Inventor: BARZEGAR FARHAD
IPC: H04B7/26
Filed: 1991-05-16
Granted: 1995-09-05
Abstract: A mobile data telephone capable of transmitting and/or receiving voice and/or data signals over cellular communication channels or other air interfaces comprises a radio transceiver and a data modem in the same physical package. The transceiver and the modem have their respective controllers coupled so that they are effectively linked to achieve control of data transfer therebetween. In response to communication channel conditions in the air interface, the data flow between the modem and an audio processor of the transceiver can be selectively altered yielding high performance and highquality data transfer rates in the presence of severe channel impairments.
Patent CA-2045662-C (CA)
Title: Binary floating point arithmetic rounding in conformance with ieee 754-1985 standard
Inventor: LIU CLIF
IPC: G06F7/535
Filed: 1990-12-17
Granted: 1994-04-26
Abstract: A method and a high speed processor (HSP) incorporating that method are set forth for processing signals representing outputs generated by remainderless division algorithms (102) and remainderless square root algorithms so as to obtain rounded outputs (112) conforming to the IEEE 754-1985 binary floating point arithmetic standard. The method and procedure of the present invention allow the solutions of floating-point computations to be rounded such that sign bits, as well as binary bits, of the rounded results are in full compliance with all guidelines of the stated standard.
Patent CA-2050562-C (CA)
Title: Aerodynamic over dimensional sign
Inventor: RUTLEDGE EDWARD ALLEN
IPC: G09F19/00
Filed: 1991-09-03
Granted: 1998-04-07
Abstract: ABSTRACT OF THE DISCLOSURE         An apparatus for reducing air drag against an apparently flat message surface when the message is intended for day or night viewing from approximately directly in front or behind.  Symbols comprising the message, or their backgrounds are inclined backwards as louvers to allow free air passage.  The symbols or their backgrounds may be placed on a plane behind and parallel to the apparent message surface, and viewed through hole(s) cut in that surface, with a gap between the two planes allowing air flow.  Night-lights above each symbol may be provided to ensure accurate night viewing.
Patent CA-2056080-C (CA)
Title: Impact-resistant graft copolymer and thermoplastic resin composition containing same
Inventor: HAGIWARA HIROSHI
IPC: C08L51/04
Filed: 1991-11-25
Granted: 1995-10-17
Abstract: A graft copolymer is formed by graft-polymerizing 10 - 95 wt. parts of a vinyl monomer onto 5 - 90 wt. parts of the rubber polymer which comprises 40 - 99 wt. % of butadiene and 1 - 60 wt. % of an aromatic polycyclic vinyl monomer represented by the following formula (I) or (II):         Formula (I)              Formula (II)                        , or wherein R denotes a hydrogen atom or a methyl group.                 The graft copolymer is characterized by the rubber polymer having a high refractive index as well as a low glass transition temperature due to the use of the aromatic polycyclic vinyl monomer.  Accordingly, the graft copolymer per se may be used as a thermoplastic resin having good transparency and impact resistance at a low rubber polymer content and may also be added to a transparent thermoplastic resin inclusive of a vinyl chloride resin and a styrene-acrylonitrile copolymer resin to provide the thermoplastic resin with an improved impact resistance while retaining a good transparency.
Patent CA-2056984-C (CA)
Inventor: MARESH JOSEPH D
IPC: B60C27/00
Filed: 1990-03-30
Granted: 1995-09-19
Abstract: A tire chain (10) comprises an elongated inner side member (12) adapted to form a circle of predetermined circumference about a vehicle wheel at the inner side thereof, the inner side member having co-operable fastener elements (14A, 14B) at oppo-site ends thereof which are joined to complete the circle. Cross members (16) form a zig-zag pattern (18) with opposite ends (18A, 18B) of the pattern adjacent to the fastener elements (14A, 14B) respectively. The pattern includes a plurality of spaced inner ver-tices (20) adjacent to the inner side member (12) and a plurality of spaced outer vertices (22) remote from the inner side member (12) and adapted to be positioned adjacent to the wheel at the outer side thereof, with the cross members (16) extending back and forth across the tread of a tire mounted on the rim. The inner vertices (20) are attached to the inner side member (12) at predeter-mined positions by connectors (24) intermediate the vertices (20) and the inner side member (12).
Patent CA-2063927-C (CA)
Title: Creping aid
Inventor: KNIGHT PAUL
IPC: B31F1/12
Filed: 1992-03-26
Granted: 1997-02-04
Abstract: A method of creping a paper is described which comprises applying to the creping drum prior to the application of the paper web to be creped, a synthetic anionic polymer.
Patent CA-2066848-C (CA)
Title: System for producing helical vegetable strips
Inventor: BOWIE JOHN M
IPC: B26D3/11
Filed: 1992-04-22
Granted: 1998-01-27
Abstract: The system comprises a tank containing water and potatoes entrained therein.  A food pump transports the mixture through a relatively long accelerator conduit of tapering cross section.  Some of the water from the output of this conduit is bypassed in accordance with the setting of a valve.  A second conduit also has a tapering cross-section to align the potatoes.  A water-operated turbine carries a disc-like cutter which is arranged in close proximity to the output of the second conduit.  The cutter cuts the potato into helical lengths.  Slitter blades on the cutter further cut the potato into helical strips.
Patent CA-2068882-C (CA)
Title: Urinal for use by female individuals
Inventor: JONES KATHIE K
IPC: E03D13/00
Filed: 1990-11-15
Granted: 1994-04-19
Abstract: A plumbing fixture (10) for installation in women's rooms that enables female individuals to urinate from a standing position. An elongate flexible hose (26) has a urine-collecting funnel (22) at its top end and its bottom end is in communication with a water-holding bowl (18) that is flushed by a siphoning action. A  sanitary cuff (72) lines the rim of the funnel (22) so that the funnel does not contact the body of the user, and the cuff (72) is knocked off the funnel after use by a passive ejector arm (44) when the funnel is suspended between the arms of a hanger member (30).
Patent CA-2070946-C (CA)
Inventor: SUZUKI YOSHIO
IPC: G11B9/14
Filed: 1992-06-10
Granted: 1996-11-26
Abstract: A cantilever type displacement element comprises a piezoelectric layer and at least two electrodes for applying a voltage to said piezoelectric layer, at least one of said electrodes being a comb-shaped electrode pair having respectively comb-tooth portions disposed separately as facing and alongside of each other in the width direction of the cantilever.
Patent CA-2076612-C (CA)
Title: Slackless drawbar
Inventor: GLOVER MARYANN
IPC: B61G9/24
Filed: 1992-08-21
Granted: 1999-05-04
Abstract: A drawbar for a slackless drawbar system is disclosed. The drawbar comprises an elongated bar having a load support portion adjacent its one end for connection to one of a pair of adjacent cars in a train, a pin receiving opening extending through the  load  support  portion,  a  hemispherical  recess extending partially around the pin receiving opening and a pin bearing having a hemispherical outer surface receivable in the hemispherical recess and a cylindrical inner surface to receive a pin.  The pin bearing  preferably  is  constructed  of  two  symmetrical  halves retained in the hemispherical recess by a retaining clip of spring material and the pin receiving opening is provided with a recess to receive the pin bearing retaining clip.  The drawbar is provided with a second load support portion at its other end which may be the same as the load support portion at its one end or which may be different if required to connect to a railway car with a different form of coupling.
Patent CA-2079100-C (CA)
Title: Wrapping a floral grouping with sheets having adhesive or cohesive material applied thereto
Inventor: WEDER DONALD E
IPC: B65B25/02
Filed: 1991-03-28
Granted: 2001-11-06
Abstract: A method for wrapping a floral grouping (30) wherein a plurality of sheets of material (12) are connected into a pad (26) of sheets of material. The pad has a top sheet (28) of material with the other sheets of material being disposed under the top sheet (28) of material. The floral grouping (30) is placed on the top sheet (28) of material. The top sheet (28) of material is wrapped about a portion of the floral grouping (30) and the top sheet (28) of material and the floral grouping (30) are rolled to wrap the floral grouping (30) in the top sheet (28) of material and simultaneously disconnect the top sheet (28) of material from the pad (26). The sheets of material are secured about the floral grouping in a wrapped position by an adhesive (24) or cohesive (40, 42, 44) on the sheets of material and the sheets of material are secured in the form of the pad (26) by the adhesive (24) or cohesive (40, 42, 44) materials on the sheet.
Patent CA-2082379-C (CA)
Title: Transformer or reactor cooled by an insulating agent
Inventor: FORSBERG ERIK
IPC: H01F27/32
Filed: 1992-10-22
Granted: 1997-01-28
Abstract: A transformer or reactor with a winding of a sheet-formed conductor material wherein the winding comprises a cooling element arranged between two consecutive winding turns and wherein the conductor material, within a region nearest the cooling element, in the axial direction of the winding has a decreasing width for each winding turn towards both the inner and outer cylindrical surfaces of the cooling element.
Patent CA-2088701-C (CA)
Title: Optical information reproducing apparatus
Inventor: TSUJI SHIGEKI
IPC: G11B7/135
Filed: 1993-02-03
Granted: 1998-01-27
Abstract: An optical information reproducing apparatus of the invention includes a light emitting and receiving unit and an optical system.  The optical system converges light from the light emitting and receiving unit on a recording medium and converges the light after reflected by the recording medium.  The light emitting and receiving unit includes: a semiconductor laser device disposed on a substrate for generating light; a photo detector formed, integrally with the substrate, on the substrate on which the semiconductor laser device is disposed, for outputting a signal corresponding to the intensity of light incident thereon; and a beam splitter provided on an optical axis of the reflected light, the beam splitter leading part of the reflected light to the photo detector.
Patent CA-2090210-C (CA)
Title: Interstitial x-ray needle
Inventor: SMITH JOHN RUDOLPH
IPC: A61N5/10
Filed: 1993-02-23
Granted: 2002-07-16
Abstract: An interstitial X-ray needle includes an elongated X-ray tube coupled to an electron emitter at one end of the tube, with a converter element being dis-posed at a tip of the other end of the tube for converting emitted electrons into X-rays; a solenoid coil wound around the tube for providing a magnetic field that confines the emitted electrons within a narrow beam; an elongated outer casing enclosing the tube and coil; and a pipe coaxially disposed between the casing and the tube for defining an inner annular flow chamber between the tip of the tube and a coolant inlet in the casing and an outer annular flow chamber between the tip of the tube and a coolant outlet in the casing.
Patent CA-2091949-C (CA)
Title: Device for supplying a circuit of a heating or cooling supply system
Inventor: DUMSER JOSEF
IPC: F24D3/10
Filed: 1993-03-18
Granted: 1997-03-04
Abstract: Units for supplying a circuit of a heating or cooling supply system which are required for conveying a medium and for regulating and monitoring are arranged at parallel pipelines for the forward and return flows so as to be combined in an installation-ready structural component group in a housing of thermal insulating plastic, the housing being divided into a lower shell and an upper shell by a seam extending approximately in the central plane formed by the pipelines, the lower shell and the upper shell having a lock-seam connection with lock-seams that form a positive-locking connection along the entire outer edges of the shells, the upper shell being provided with openings that allow the parts of the units essential for operation to penetrate, while the lower shell is provided with a component for direct fastening to a wall, the strength and thickness of the material of the lower shell and upper shell being selected so that the housing can be used as protective transportation packing for the structural component group and as thermal insulating sheathing after assembly.
Patent CA-2095460-C (CA)
Inventor: THIERMANN JOHN H
IPC: B65D47/06
Filed: 1993-05-04
Granted: 2000-02-29
Abstract: POUR  SPOUT        Abstract of the Disclosure A pour spout for pouring a fluid, such as fuel, by gravity from a container to a tank.  The spout includes a conduit having one end connected to the fuel container and having a second end to be positioned within the neck of the tank.  A sleeve is mounted for sliding movement within the conduit and the outer end of the sleeve carries a closure which closes off the discharge end of the conduit.  A seal is incorporated to prevent the entry of foreign particulate material into -the sliding interface formed between the conduit and sleeve. The seal is provided by an annular skirt which overlaps with an annular flange together with an annular jacket of resilient foam material surrounding the sleeve and conduit at the location of the sliding interface.
Patent CA-2097830-C (CA)
Title: Spray-dried antigenic products and method of preparation
Inventor: NEWMAN STEPHEN G
IPC: A23K1/18
Filed: 1991-12-04
Granted: 2000-02-01
Abstract: A method is described for preparing an antigenic product which incorporates exposing an aerosol of a microbial suspension to temperatures at which substantially only the heat stable components of the microbial suspension retain their immunogenic properties. More specifically, the aerosol is exposed to an elevated temperature which denatures all labile components and removes the liquid portion of the aerosol by evaporation.
Patent CA-2102384-C (CA)
Inventor: SCHUMACHER ROBERT W
IPC: H01J37/32
Filed: 1993-11-03
Granted: 2000-01-11
Abstract: A high dose rate, high impedance plasma ion implantation method and apparatus to apply high voltage pulses to a target cathode (6) within an ionization chamber (2) to both sustain a plasma in the gas surrounding the target, and to implant ions from the plasma into the target (6) during at least a portion of each pulse (18). Operating at voltages in excess of 50kV that are too high for the reliable formation of a conventional glow discharge, the plasma is instead sustained through a beam-plasma instability interaction between secondary electrons emitted from the target (6) and a background pulsed plasma. The voltage pulses are at least about 50kV, and preferably 100kV or more. Pulse durations are preferably less than 8 microseconds, with a frequency in the 50-1,000Hz range. The preferred gas pressure range is 1x10 -4 - 1x10 -3 Torr; auxiliary electrodes (24a, 24b) can be used at the lower pressures to provide sufficient seed electrons for initiating a plasma, which is sustained by the beam-plasma instability interaction.
Patent CA-2107094-C (CA)
Title: Acetabular prosthesis having a metal socket bearing
Inventor: NOILES DOUGLAS G
IPC: A61F2/34
Filed: 1993-02-18
Granted: 2005-05-10
Abstract: An acetabular prosthesis (8) having an orientable metal socket bearing (13) and a cup (10) for fixation to bone (6) is provided. The bearing (13) has a male taper (26) which locks into a corresponding female taper (28) formed in the cup (10). Two screws (15) are used to seat the bearing (13) in the cup (10) and to further secure the taper lock. The assembly of the bearing (13) and cup (10) forms a set of peripheral apertures (4) through which bone screws (15) can pass to further secure the cup (10) to the patient's bone (6).
Patent CA-2109260-C (CA)
Title: Overcurrent protection device with programmable communications and inactivity
Inventor: LAGREE JAMES LEO
IPC: H02H3/00
Filed: 1993-10-26
Granted: 2003-04-29
Abstract: A microprocessor based overcurrent trip unit which generates trip signals as an adjustable function of current and time, has an alpha-numeric display on a front panel in which the address and the baud rate for communications with a remote station can be set through membrane puck buttons.      The trip unit automatically clears a programming mode and test mode if no operator input is detected for a pretermined time interval.
Patent CA-2118564-C (CA)
Inventor: AGOURIDAS CONSTANTIN
IPC: A61K31/70
Filed: 1994-03-08
Granted: 2007-05-08
Abstract: The subject of the invention is the compounds of formula (I) <IMAGE>  in which:     - X and Y represent a hydrogen atom or together form a radical: <IMAGE>     - R represents a radical: <IMAGE> in which m represents an integer between 0 and 20, n represents a number 0, 1, 2 or 3, XA = alkyl, alkenyl, alkynyl, Hal, C IDENTICAL N, NR1R2, OR3, COR4, CO2R5, SR6, <IMAGE>  SO2R8, <IMAGE>  aryl, heteroaryl, or OC(Ar)3 and   Z = H or an acid residue.   The compounds of formula (I) have antibiotic properties.